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Calendar.FirstDayOfWeek Property

Gets or sets the day of the week to display in the first day column of the Calendar control.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

public FirstDayOfWeek FirstDayOfWeek { get; set; }
<asp:Calendar FirstDayOfWeek="FirstDayOfWeek" />

Property Value

Type: System.Web.UI.WebControls.FirstDayOfWeek
One of the FirstDayOfWeek values. The default is Default, which indicates that the day specified in the system setting is used.

ExceptionCondition
ArgumentOutOfRangeException

The date specified is not one of the FirstDayOfWeek values.

Use the FirstDayOfWeek property to specify the day of the week to display in the first day column of the Calendar control. This property is set with one of the FirstDayOfWeek enumeration values. You can specify any day of the week or FirstDayOfWeek.Default, which indicates that the date is determined by the system settings.

TopicLocation
How to: Customize Calendar Web Server Control AppearanceBuilding ASP .NET Web Applications
How to: Customize Calendar Web Server Control AppearanceBuilding ASP .NET Web Applications

The following code example demonstrates how to use the FirstDayOfWeek property to set the first day column to Monday.

<%@ Page Language="C#" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Calendar Example</title>
</head>
<body>

   <form id="form1" runat="server">

      <h3>Calendar Example</h3>

      <asp:Calendar id="calendar1" runat="server"
           FirstDayOfWeek="Monday"/>

   </form>


</body>
</html>
<%@ Page Language="C#" AutoEventWireup="True" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <script runat="server" >

      void Selection_Change(Object sender, EventArgs e)
      {

         // Set the first day of the week.
         Calendar1.FirstDayOfWeek = (FirstDayOfWeek)DayList.SelectedIndex;

      }

   </script>

<head runat="server">
    <title> Calendar FirstDayOfWeek Example </title>
</head>
<body>

   <form id="form1" runat="server">

      <h3> Calendar FirstDayOfWeek Example </h3>

      Select the first day of the week.

      <br /><br /> 

      <asp:Calendar id="Calendar1"
           ShowGridLines="True" 
           ShowTitle="True"
           runat="server"/>

      <br /><br />

      <table cellpadding="5">

         <tr>

            <td>

               First day of the week:

            </td>

         </tr>

         <tr>

            <td>

               <asp:DropDownList id="DayList"
                    AutoPostBack="True"
                    OnSelectedIndexChanged="Selection_Change"
                    runat="server">

                  <asp:ListItem> Sunday </asp:ListItem>
                  <asp:ListItem> Monday </asp:ListItem>
                  <asp:ListItem> Tuesday </asp:ListItem>
                  <asp:ListItem> Wednesday </asp:ListItem>
                  <asp:ListItem> Thursday </asp:ListItem>
                  <asp:ListItem> Friday </asp:ListItem>
                  <asp:ListItem> Saturday </asp:ListItem>
                  <asp:ListItem Selected="True"> Default </asp:ListItem>

               </asp:DropDownList>

            </td>

         </tr>

      </table>  

   </form>

</body>
</html>
 

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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